Coke-oven door.



H. KIGKERT.

COKE OVEN DOOR. APPLICATION FILED DEC. 21, 1912.

Patented Sept. 9, 1913.

HKICKERT. .INVENTOR ATTORNEY IAPIl co WASHINGTON u. c.

coxirovn'n boon.

Lttiafitii.

Specificatitii)- of letters Patent.

Patented Sept. 9, 19113.

. Application filed December 21, 1912. Serial No. 738,003:

To all whom it may concern:

Be it known that I, HERMANN KIOKERT,

at Herringen, near Hamm, Westphalia, Germany, have invented certain new and useful Improvements in CokeOven Doors, of.

which the followin'gis a specification.

This invention has for its object to provide an improved construction of coke oven doors of the type, which comprisea cast iron or wrought iron frame or a combination of such frames and which are bricked up on the fire side. Existing coke oven doors of this type are difiicult to handle; they are not resistent to heat and therefore often need repairing. Owing to the many joints and the slight durability of the brickwork those doors become leaky after a short time, thus causing loss of heat and rendering it very difficult to work on the coke quenching place owing to the radiated heat.

Now the present invention has for its object to remedy those drawbacks. To this end a coke oven door according to this invention is made of reinforced concrete and is provided on the fire side with a heat insulating lining closed in by a wall composed of renewable, specially shaped bricks of highly refractory material. By this means a coke oven door is provided, having perfectly smooth surfaces and very few joints.

By the aforesaid insulation and jointing, the outer side of the improved door is kept so cool that it can be touched by the hand without inconvenience. The upper inside parts of the door which are exposed to the most intense heat are readily repairable by merely replacing the worn bricks with fresh ones at only a small expenditure of money and time. The aforesaid wall of refractory brickwork is also very suitable for use with a coke oven door having an iron frame and an inner insulating layer, because the edges of the iron frame are protected effectively from the heat of the coke oven.

This invention is illustrated in the accompanying drawings, in which Figure 1 is a front elevation of an example of a coke oven door constructed according to-this invention, Fig. 2 is a horizontal section on the line 22 in Fig. 1, Fig. 3 is a crosssection on the line 3-3 in Fig. 1, Fig. 4 is a vertical longitudinal section on the line 4l in Fig. 2.

The improved coke oven door shown in Figs. 1 to t consists of an outer wall a of concrete, preferably basalt concrete reinforced with iron insets, for instance tension bars and cross bars 6. Against one side of the wall a there is an insulating layer 0 of kieselguhr, stone-wood, cork or similar non-conductor of heat. The basalt-concrete above referred to consists of a mixture of chips of basalt, clean sand, and cement; and the substance referred to as stohe=wood is also known as xyloltith and is a chemical compound of saw-dust and minerals formed under high pressure into fire proof material of a wood-like character, which material is a bad heat conductor. Strips of canvas or wire cloth or netting are inserted in the insulating layer 0 for the purpose of imparting greater strength and durability thereto. The insulating layer 0 is covered in on the fire side with removable shaped bricks or blocks (Z of highly refractory material, for instance ganister, or fireclay. Asbestos plates t are placed at the places of contact between the bricks and the wall a for the purpose of making tight joints. The fire clay bricks (Z are assembled together with tongue and groove joints and are connected to the concrete wall a by bolts f. These bolts f are coated with waterglass for the purpose of making gas-tight joints, and they have sunk heads 9 which fit in undercut recesses h in the bricks (Z. The space left vacant in these recesses h after the bolts f have been inserted therein is filledand rammed tight with kieselguhr, fireclay, asbestos or the like. A series of air passages 6 (Figs. 2 and 3) are provided between the insulating layer 0 and the concrete wall a which open out on the outer side of the wall a through upper and lower cross passages 2'. Cold air enters the lower passages i, becomes heated therein and passes out at the top, the resulting draft of 'air effecting a further cooling of the concrete wall a.

For the purpose of securing the lower edges of the door, angles m fixed by means of anchor bolts 76 are provided at those places, and iron plates a and p are similarly provided on the outer side of the wall a, in order to prevent premature wearing away of those parts by. the friction latches or catches 0 which keep the door closed. An opening 9' with an iron frame o may be provided in the upper part of the door for the purpose of allowing of leveling the coke. A loop or handle 8 is provided for the purpose of raising the door in the usual manner. Ledges or brackets 12 may be provided at suitable points of the concrete Wall for the purpose of facilitating the luting and sealing of the door.

What I claim is 1. In a coke oven or furnace door, the combination of an outer concrete Wall, an inner wall of shaped blocks of highly heatrefractory material, and an intermediate layer of heat-insulating material located between said outer concrete wall and said inner wall of shaped blocks.

2. In a coke oven or furnace door, the combination of an outer concrete wall, an inner wall of shaped blocks of highly heat refractory material, and an intermediate layer of heat-insulating material located between said outer concrete wall and said inner wall of shaped blocks with strips of reticulated fabric embedded in said interme diate layer of heat-insulating material.

3. In a coke oven or furnace door, the combination of an outer concrete wall, an inner wall of shaped blocks of highlyheatrefractory material, and an intermediate layer of heat-insulating material located between said outer concrete wall and said innor wall of shaped blocks, said intermediate layer being provided with air passages opening at top and bottom on the outer side of the door. 1

In testimony whereof I afiiX my signature in presence of two Witnesses.

HERMANN KICKERT. [1. s.] Witnesses:

HELEN NUEER, ALBERT NUFER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

